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T. B. SMITH, OF NEW YORK, N. Y.

METHOD OF BURNING TI-IE THREADS ON WOODEN SCREWS.

Specification of Letters Patent No.

To @ZZ whom it may concern:

Be it known that I, T. BniGGs SMITH, of the city and State of New York,have invented a new and Improved Mode of Making and Introducing Bungsinto Casks or Any Wooden Vessel for Liquids; and I do hereby declarethat the following is a full and exact description thereof, referencebeing had to the accompanying drawings and to the letters of referencemarked thereon.

The nature of my invention consists in forming a'screw by burning on thebung or stopple; also in burning a corresponding screw on the hole inthe stave. The bung will be air-tight, in consequence of its smoothimperishable charred surface. A screw cut by any tool across the grainof the wood could not be made perfectly tight.

To enable others skilled in the art to make and use my invention, I willproceed to describe the construction and operation of the apparatus bywhich it may be carried into effect.

I construct a stove No. 1 for heating with ordinary fuel the burners Aand B. No. 2 is a stand attached to which is a mandrel C, with a screwout on the same corresponding with the screws on the burners A and B.The burners A and B pass through the apertures D and D in stove No. l,there to be heated as required, by moveng them out or in to produce theproper degree of heat 22,985,` dated February 15, 1859.

and fastened, when required,by the screw E. The burners A and B do notrevolve, the necessary revolutions being effected by the mandrel orscrew C attached to which is the apparatus F for holding the stave Withthe aid of the clamps G and G and the screws II and H.

I is an apparatus atlixed to the mandrel C for holding the bung I whilebeing burned by the revolving mandrel C. Either F. p11 I can be attachedto the mandrel C at wi K is a section of a stave with a hole in it readyfor burning.

L is a wrench for inserting and removing the bungs.

that I claim as my invention and desire to secure by Let-ters Patentisl. The application of a screw made on'a bung and another screw made inthe stave corresponding with that upon the bung both being formed byburning. This bung is to be used for all casks or vessels made of woodfor liquids. i

2. I also claim the forming a screw by burning on a bung or stopple tobe used in any vessel, made of any material, whether wood, metal, glass,or other material.

T. BRIGGS SMITH.

IVitnesses T. C. I-I. SMITH, L. WV. SMrrrr.

